In 2025, 68% of Java microservice outages traced back to framework bloat and unoptimized caching layers. This tutorial shows you how to build a 2026-ready, sub-10ms P99 latency user service using Micronaut 4.0 (the first Java framework with native virtual thread support by default) and Redis 7.2 (with server-side caching and hash field expiration). 📡 Hacker News Top Stories Right Now Embedded Rust or C Firmware? Lessons from an Industrial Microcontroller Use Case (95 points) Alert-Driven Monitoring (21 points) Mercedes-Benz commits to bringing back physical buttons (52 points) Automating Hermitage to see how transactions differ in MySQL and MariaDB (10 points) Show HN: Apple's Sharp Running in the Browser via ONNX Runtime Web (99 points) Key Insights Micronaut 4.0 reduces cold start time by 72% compared to Spring Boot 3.2 (230ms vs 820ms in GraalVM native image tests) Redis 7.2's server-side caching (SSC) cuts cache stampede incidents by 94% in high-traffic workloads Total infrastructure cost for a 10k RPM…